package com.vma.interfaceShoes.util;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;


public class ImageTool {
	

	public static boolean generateImage(String imgStr, String imgFile)throws Exception {// 对字节数组字符串进行Base64解码并生成图片
		if (imgStr == null) { // 图像数据为空
			return false;

		} else {
			BASE64Decoder decoder = new BASE64Decoder();

			// Base64解码
//			String t = imgStr.replace("data:image/jpeg;base64,", "");
			String t = imgStr.split("base64,")[1];


			byte[] b = decoder.decodeBuffer(t);
			for (int i = 0; i < b.length; ++i) {
				if (b[i] < 0) {// 调整异常数据
					b[i] += 256;
				}
			}
			// 生成jpeg图片
			OutputStream out = new FileOutputStream(imgFile);
			out.write(b);
			out.flush();
			out.close();
			return true;

		}
	}
	
	public static String getImageStr(String imgFile) {// 将图片文件转化为字节数组字符串，并对其进行Base64编码处理
		//String imgFile = "d:\\111.jpg";// 待处理的图片
		InputStream in = null;
		byte[] data = null;
		// 读取图片字节数组
		try {
			in = new FileInputStream(imgFile);
			data = new byte[in.available()];
			in.read(data);
			in.close();
			} catch (IOException e) {
			e.printStackTrace();
			}
			// 对字节数组Base64编码
			BASE64Encoder encoder = new BASE64Encoder();
			return "data:image/jpeg;base64,"+encoder.encode(data);// 返回Base64编码过的字节数组字符串
		}
}
